Cutting device.



PATEN TED J UL'Y- l 2', l 904.

C. T. KNI'I'TBL. CUTTING DEVICE.

APPLICATION mum AUG. 12. 1903.

no MODEL.

Fig. 1

mmw i OOQ QOQQLVOLZ IV L WiLnesse's.

Patented July 12, 1904.

PATENT OFFICE.

CARL THEODOR KN ITTEL,

CUTTING OF FREIBURG, GERMANY.

DEVICE.

SPECIFICATION forming part of Letters Patent N 0. 765,083, dated July12, 1904.

Application filed August 12, 1903.

To all whom it incty concern:

Be it known that I, CARL THEODOR KNIT- TEL, a subject of the Emperor ofGermany, residing at Freiburg, Germany, have invented certain new anduseful Improvements in Cutting Devices, of which the following is aspecification.

The present invention has reference to im provements in devices forcutting paper, cardboard, glass, and the like comparatively thin sheets;and the object of the invention is to provide a cutting device for thepurpose indicated by means of which clean straight cuts are obtainable,which will produce true right angles and which will prevent thecutting-tool from slipping or leaving the straight line, and therebyinjuring the guiding-rule.

With this object in view the invention consists in the construction,arrangement, and cooperation of the various parts now to be particularlydescribed, with reference to the accompanying sheet of drawings.

Figure 1 shows a front elevation of the device; Fig. 2, a plan view ofsame, and Fig. 3 a sectional elevation on line A B of Fig. 2.

The guide-ruler forms the essential part of the device. Upon its upperface are provided in any suitable manner two scales (Z withgraduation-numerals-for instance, as shown, 1 to 23. Between these twoscales is provided a metal strip having a longitudinal slot f, asclearly shown in Figs. 2 and 3. This slot serves to guide thecutting-tool, and the latter is thereby prevented from leaving thestraight course. A second ruler a is hinged to the main ruler i by meansof swing-arms it, so that it can pivot about the hinge-pivots r and alsoabout its own axis, with the result that it can be folded into the planeof the ruler 2', as shown in dotted lines in Fig. 1. The auxiliary rulern is also provided with a scale s for reading 01f the dimensions of theobject to be cut. Into the narrow longitudinal faces metal strips 12/are sunk to prevent the cutting-tool from injuring the ruler.

For the purpose of cutting thin paper without having to make use of theguiding-slot f, simply by guiding the knife along the ruler a, there isprovided a metal strip on on the un- Serial No. 169,297. (No model.)

der face of ruler 2'. To make use of this strip a, the ruler n is swungabout the axis 7' r unt1l1t takes the position shown in Fig. 3,

and the whole device is then inverted. The

described cutting device may be made of any desirable size, so thatlarge and small drawings, glass plates,and the like may be handled.

To further improve the described device, I provide a measuring-plate .eand connect it suitably with the ruler 2 This plate 2 is provided withstop-ledges a and b and with a square design corresponding to the scalesof the rulers. cured on the plate .2 rectangular] y to the guideslot f.If, consequently, one edge of the sheet to be cut is placed against thelodge a, the out along the ruler n will necessarily be at right anglesthereto. In cutting, the object to becut is laid upon the plate 2 andruler 2' and the auxiliary ruler a is placed on the top, as shown inFig. 1. The stop-ledge b is movable and is provided with-two pins,adapted to take into holes provided at the intersections of thegraduation-lines. The ledge Z) is of a width to cover two squares, andthe width of the ruler 2 likewise is of a multiple of the squaregraduation. In order to cut a sheet of paper of definite width, thegraduation units between ledge b and ruler n are counted, the half-widthof ruler is added, and the width of the paper to be cut off is therebydetermined. The stop-ledge Z) covers two squares plus a width 1 Thisarrangement allows of using the glaziers diamond, the width 3corresponding to the distance of the diamonds point to the edge of thesetting. For cutting glass with the diamond the stopledge Z2 isreversed, bringing the inner face into the position shown by a dottedline in Fig. 2, causing the object to be cut to be advanced for the samedistance.

Since the plate 2 can be disconnected from the ruler 6 along the line CD, the tool may be used with or without the plate.

What I claim, and desire to secure by Letters Patent, is

1. In cutting devices, the combination, of a main ruler,graduation-scales on said ruler, a longitudinal. metal strip on one sideof said ruler with a slot over its entire length, a lon- The stop-ledgea is rigidly segitudinal metal strip on the other side of said ruler, anauxiliary ruler, swinging arms con necting the two said rulers, so thatthe auxiliary ruler may be swung above or below the said main ruler orin a plane therewith, a scale on said auxiliary ruler, and longitudinalmetal insertions in the narrow sides of said auxiliary ruler,substantially as and for the purpose set forth.

2. In cutting devices, the combination, of a main ruler,graduation-scales on said ruler, a longitudinal metal strip on one sideof said ruler with a slot over its entire length, a longitudinal metalstrip on the other side of said ruler, an auxiliary ruler, swinging armsconnecting the two said rulers, so that the auxiliary ruler may be swungabove or below the said main ruler or in a plane thereto, a scale onsaid auxiliary ruler, longitudinal metal insertions in the narrow sidesof said auxiliary ruler, a graduated plate, means for temporarilyconnecting the said plate to the said main ruler, a stop-ledge rigidlysecured to the said plate, rectangularly to the said main ruler, astop-ledge adapted to be temporarily secured on said plate in differentpositions parallel to the said main ruler, and means for temporaril ysecuring the said stop-ledge on said plate, substantially as and for thepurpose set forth. In testimony that I claim the foregoing as myinvention I have signed my name in presence of two subscribingwitnesses.

CARL THEODOR KNITTEL. Witnesses:

J osEr VVIOKENHAUsER, FRIEDR. PHIL. Kooi-r.

